
Modeling LTI systems
Establish model
1. tf(sys2)
2. tf(sys3)
3. zpk(sys1)
4. zpk(sys3)

5. ss(sys1)
6. ss(sys2)

7. [num,den] = tfdata(sys1)
Cell array
num = [0,0,3,3]
den = [1,4,14,20]
8. [num,den] = tfdata(sys2)
Cell array
num = [0,0,3,0]
den = [1+0i, 4-6i, -4-18i, -16-12i]
9. [num,den] = tfdata(sys3)
Cell array
num = [0,0,3,3]
den = [1,4,14,20]
10. [num,den] = tfdata(sys1,’v’)

11. [num,den] = tfdata(sys2,’v’)
12. [num,den] = tfdata(sys3,’v’)
13. [num,den] = zpkdata(sys1)
Cell array
num = -1
den = [-0.999999999999998+3i; -0.999999999999998-3i; -1.999999999999999+0i]
14. [num,den] = zpkdata(sys2)
Cell array
num = 0
den = [-1+3i; -1+3i; -2+0i]
15. [num,den] = zpkdata(sys3)
Cell array
num = -1
den = [-0.999999999999998+3i; -0.999999999999998-3i; -1.999999999999999+0i]